<?php
$layoutname= $this->getConfig('cpanelsection/layoutgroup/layoutname');
if ($layoutname == "white") { ?>
    <link rel="stylesheet" type="text/css" href="<?php echo $block->getViewFileUrl('css/whitedemo.css')?>">
<?php } else { ?>
    <link rel="stylesheet" type="text/css" href="<?php echo $block->getViewFileUrl('css/blackdemo.css')?>">
<?php } ?>
